The Can-Fan Max Fan HO “The Beast” is a high-output mixed-flow inline fan that moves 3343 CFM through a 14-inch duct. Note the electrics: this listing is the 240-volt version — it needs a 240 V circuit, not a standard 120 V outlet. This page gives the maker’s published airflow, voltage, wattage, amperage, duct size, dimensions, and build; explains why a fan is sized to a grow room’s air-exchange needs and how it pairs with a carbon filter; shows the best uses, how it compares to a standard-output inline fan, where it fits, and who it is not for — all cited. It is a ventilation fan, not a filter or a controller.
What it is
“The Beast” is a high-output (HO) inline duct fan built on a mixed-flow impeller design, which blends the pressure of a centrifugal blower with the throughput of an axial fan. It moves 3343 CFM measured at zero static pressure (0 wg) and fits 14-inch (inlet and outlet) ducting. Can-Fan describes it as bringing energy efficiency to larger systems. Unlike a carbon filter or a fan-speed controller, the fan itself only moves air — it is the airflow engine you build a ventilation or scrubbing loop around.
Guaranteed analysis and specifications
| Fan type | high-output (HO) mixed-flow inline duct fan |
|---|---|
| Airflow | 3343 CFM at 0 wg |
| Duct size (inlet / outlet) | 14 in |
| Voltage | 240 V — requires a 240 V circuit |
| Max power | 960 W maximum |
| Amperage | 5.4 A @ 230 V AC 50 Hz |
| Dimensions | 14 in diameter x 15.75 in long |
| Housing | galvanized |
| Max ambient temperature | 45 °C / 105 °F |
| Power cord | 6 ft cord |
| Made in | Germany |
| Manufacturer SKU | 736841 |
Note on the electrical figures: the amperage the maker publishes is 5.4 A at 230 V AC, 50 Hz, which is how Can-Fan rates this German-built motor. Sold as the 240 V model, it must run on a 240 V circuit — always size the breaker and wiring to the motor and follow local electrical code (a physical-world / licensed-electrician job, not a spec we invent here).
Why choose “The Beast”
- High output for large exhaust or scrubber loops. At 3343 CFM it is built for big rooms and long, filtered duct runs where a smaller fan would stall.
- Mixed-flow design. The mixed-flow impeller holds airflow better against the back-pressure a carbon filter adds than a plain axial fan does, and the maker states its optimized mixed flow is quieter than comparable fans.
- Efficiency positioning. Can-Fan calls it extremely energy efficient, citing very high aerodynamic efficiency. These are Can-Fan’s own positioning claims, not an independent test result.
- Built to last. The galvanized housing is made in Germany.
- Sizing headroom. Because ventilation fans should be matched to a room’s air-exchange demand — roughly 8 CFM per square foot of growing area in the hot season and 2 CFM per square foot in the cool season — a 3343 CFM fan gives large rooms the capacity, and filtered loops the headroom, to hit that target.
Best uses
- Whole-room exhaust. Pulling hot, humid, spent air out of a large grow room or tent, sized so the fan can meet the room’s air-exchange target of about 8 CFM per square foot in the heat and 2 CFM per square foot when cool.
- Carbon-filter (odor-scrubbing) loops. Its mixed-flow design is well suited to pushing or pulling air through a carbon filter, which adds static pressure a weaker fan cannot overcome. Can-Fan itself pairs “The Beast” with recirculating filters such as the Max 2500, Can 150, and Can-Lite 14×50 XL.
- Long or restrictive duct runs. The high output leaves headroom for the pressure losses of long ducting, bends, and silencers that would choke a low-pressure axial fan.
- Larger commercial or multi-light rooms. The maker positions it for larger systems — the scale at which 240 V and 14-inch duct make sense.
Why fan sizing (and a carbon filter) matter
A grow-room fan is not “bigger is always better” — it is sized to the volume of air the space needs to exchange. University-extension guidance for a covered growing space gives a rate of about 8 CFM per square foot of growing area in the hot season and about 2 CFM per square foot in the cool season, so you multiply your floor area by that rate to get the exhaust CFM a room actually needs. Internal air mixing is a separate figure — around 25% of the overall growing volume per minute — handled by circulation fans rather than the exhaust fan. A high-output fan like “The Beast” earns its place when the calculated exhaust demand is large, or when a mixed-flow fan is needed to hold that airflow through the added resistance of a carbon filter used to scrub odor. The extension guidance is general horticultural mechanism; the fan’s own numbers are the maker’s.
How it compares to a standard inline fan
This table is factual — it does not claim one out-performs another for your room; the right choice depends on your calculated air-exchange demand and duct resistance.
| Factor | Can-Fan Max Fan HO “The Beast” 14 in (240 V) | A typical standard inline / axial fan |
|---|---|---|
| Impeller | mixed-flow (centrifugal-plus-axial) | plain axial in most inexpensive inline fans |
| Rated airflow | 3343 CFM at 0 wg | varies by model — generally much lower at 14 in |
| Behaviour under a filter (back-pressure) | holds airflow better — a mixed-flow strength | airflow drops off faster against static pressure |
| Voltage | 240 V — needs a 240 V circuit | commonly 120 V |
| Best fit | large rooms, long or filtered duct runs, high exhaust demand | small tents / short runs / lower demand |
Compatibility and operating range
Can-Fan does not publish a noise (dB) figure, a static-pressure/airflow curve, or a fan weight for this model, so those are held below rather than guessed.
- Ducting: it takes 14-inch inlet and outlet ducting.
- Electrical: it is the 240 V model drawing up to 960 W / 5.4 A at 230 V AC 50 Hz, with a 6 ft cord — it must be wired to a suitable 240 V circuit.
- Ambient limit: the maker rates it to a maximum ambient temperature of 45 °C / 105 °F.
- Carbon filter: the maker lists recirculating filters (Max 2500, Can 150, Can-Lite 14×50 XL) as pairings for scrubbing.
- Speed control: Can-Fan’s product page does not state whether this model is speed-controllable, so we do not claim it here — see the honest-fit section.
Where it fits
For other options in this part of the catalogue, browse the inline & booster fans category. General store policies are described on the about page. Wiring a 240 V fan and sizing it to your room are physical-world jobs — plan them around your own space and local code.
Frequently asked questions
How much air does it move, and through what duct? 3343 CFM at 0 wg through 14-inch ducting.
Is this a 120 V fan? No — this listing is the 240 V model. It needs a 240 V circuit and draws up to 960 W / 5.4 A at 230 V AC 50 Hz.
What size room is it for? Large ones. Size it to your air-exchange demand — about 8 CFM per square foot in the hot season, 2 CFM per square foot when cool — and leave headroom for a carbon filter’s back-pressure.
Will it drive a carbon filter? Yes — the mixed-flow design holds airflow against filter back-pressure, and the maker pairs it with recirculating filters such as the Max 2500 and Can-Lite 14×50 XL.
How loud is it? Can-Fan states its optimized mixed flow is quieter than comparable fans, but does not publish a decibel figure — so we do not state one.
Who this is for — and who should skip it
Suited: growers with a large room, tent, or filtered duct loop whose calculated exhaust demand is high, who have (or can install) a 240 V circuit, and who want a high-output mixed-flow fan that holds airflow through a carbon filter.
Not for / its limits: it is a ventilation fan, not a carbon filter and not a speed controller — it moves air, nothing else. It is the 240 V version, so it will not run on a standard 120 V outlet and needs proper 240 V wiring (a licensed-electrician / physical-world job). It is oversized for a small tent or short unfiltered run, where a smaller fan sized to your air-exchange demand would fit better. Beyond the maker’s stated positioning we make no performance claim; Can-Fan does not publish a decibel rating, a static-pressure/airflow curve, a fan weight, or a stated speed-controller compatibility for this model, so those are held rather than guessed.
Ready to add it to your setup? Add to cart, or talk to a grower about sizing a fan and filter to your room and 240 V wiring.
Sources
- Can-Fan (Can-Filters) — Max-Fan HO “The Beast” 14″ 240V product page (SKU 736841; 3343 CFM at 0 wg, 14″ duct, 240 V, 960 W max, 5.4 A @ 230 V AC 50 Hz, 14″ dia x 15.75″ long, galvanized housing, 45°C/105°F max ambient, 6 ft cord, made in Germany, 5-year warranty, mixed-flow / “optimized mixed flow is quieter than comparable fans” / “very high aerodynamic efficiency” / “extremely energy efficient” positioning, recirculating-filter pairings; retrieved 2026-07-06): https://canfilters.com/product/can-fan-max-fan-ho-the-beast-14-inch-240v/
- University of Vermont Extension — Ventilation in Greenhouses and High Tunnels (air-exchange rate 8 CFM/ft² hot season, 2 CFM/ft² cool season; circulation ~25% of growing volume per minute; retrieved 2026-07-06): https://blog.uvm.edu/cwcallah/2019/08/14/ventilation-in-greenhouses-and-high-tunnels/
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